As far as we know, there has been no literature studying the SSL pre-training for transformer-based ReID. Therefore we first conduct an empirical study to gain better understanding on this problem. We investigate two backbones (CNN-based ResNet50 and Transformer-based ViT), four SSL methods (MoCoV2, MoCoV3, MoBY and DINO), and two pre-training datasets (ImageNet and LUPerson). MoCoV2 used here is a modified version proposed to adapt to person ReID on ResNet50 in [1]}, while the other three methods, MoCoV3, MoBy and DINO, are transformer-specific methods proposed on the ImageNet data.
